﻿			* {
				margin: 0;
				padding: 0;
			}

			.pptbox {
				width: 400px;
				height: 100px;
				position: relative;
				overflow: hidden;
			}

			.pptbox .innerwrapper {
				width: 2400px;
				/*当增加了li之后，大盒子的宽度也要相应的增加 这里增加了两个li，每个400，所以ul 从原来的1600变成了2400*/
				height: 100px;
				list-style: none;
				position: absolute;
				left: -400px;
			}

			.innerwrapper li {
				width: 400px;
				height: 100px;
				float: left;
			}

			.innerwrapper li a {
				display: block;
			}

			.innerwrapper li a img {
				width: 400px;
				height: 100px;
				display: block;
			}

			.btnleft {
				width: 40px;
				height: 50px;
				position: absolute;
				left: 0;
				top: 50px;
				background-color: black;
				background-image: url(../img/nav.png);
				background-position: 0px;
				background-repeat: no-repeat;
				cursor: pointer;
				z-index: 100;
				color: #fff;
			}

			.btnright {
				width: 40px;
				height: 50px;
				position: absolute;
				right: 0px;
				top: 15px;
				background-color: black;
				background-image: url(../img/nav.png);
				background-position-x: -40px;
				background-repeat: no-repeat;
				cursor: pointer;
				z-index: 100;
				color: #fff;

			}

			/*控制按钮开始*/

			.controls {
				width: 96px;
				position: absolute;
				left: 152px;
				bottom: 10px;
				list-style: none;
			}

			.controls li {
				width: 20px;
				height: 20px;
				background-color: gold;
				float: left;
				margin-right: 2px;
				text-align: center;
				border-radius: 10px;
				cursor: pointer;
			}

			.controls li.current {
				background-color: aqua;
				color: brown;
			}

			/*控制按钮结束*/